chore: syntax highlighting

removing in code links, which we don't do anymore

src/content/docs/apis/rest-api-v2/account-examples-v2/listing-users-your-account.mdx

@@ -27,14 +27,14 @@ This generates a list of users on our [original user model](/docs/accounts/origi
 
 To obtain a list of all users on the [original user model](/docs/accounts/original-accounts-billing/original-product-based-pricing/overview-user-models) for your account, use this command:
 
-```
+```sh
 curl -X GET 'https://api.newrelic.com/v2/users.json' \
-     -H "x-api-key:<a href='/docs/apis/rest-api-v2/getting-started/introduction-new-relic-rest-api-v2#api_key'>$API_KEY</a>" -i
+     -H "x-api-key:$API_KEY" -i
 ```
 
 The output will appear similar to this:
 
-```
+```json
 HTTP/1.1 200 OK
 Content-Type: application/json
 
@@ -70,9 +70,9 @@ If you know all or part of the user's email, you can use this command to return
 
 <DNT>**Note:**</DNT> Character matching is a simple string. No regular expression capability is available, so multiple matches may occur if the selected string is not unique.
 
-```
+```sh
 curl -X GET 'https://api.newrelic.com/v2/users.json' \
-     -H "x-api-key:<a href='/docs/apis/rest-api-v2/getting-started/introduction-new-relic-rest-api-v2#api_key'>$API_KEY</a>" -i \
+     -H "x-api-key:$API_KEY" -i \
      -d 'filter[email]=my.name'
 ```
 
@@ -82,17 +82,17 @@ The output for this command will be the same as the first entry in the [Listing
 
 If you know the user `id`, you can use this command to return the role, name, and email. The `filter[ids]=` clause specifies the user `id`.
 
-```
+```sh
 curl -X GET 'https://api.newrelic.com/v2/users.json' \
-     -H "x-api-key:<a href='/docs/apis/rest-api-v2/getting-started/introduction-new-relic-rest-api-v2#api_key'>$API_KEY</a>" -i \
+     -H "x-api-key:$API_KEY" -i \
      -d 'filter[ids]=123456'
 ```
 
 You can also use this command, which embeds the user `id` in the URL and omits the filter.
 
-```
+```sh
 curl -X GET 'https://api.newrelic.com/v2/users/123456.json' \
-     -H "x-api-key:<a href='/docs/apis/rest-api-v2/getting-started/introduction-new-relic-rest-api-v2#api_key'>$API_KEY</a>" -i
+     -H "x-api-key:$API_KEY" -i
 ```
 
 The output for this command will be the same as the first entry in the [Listing all account users](#list_all_users) example.